body {
	padding: 0px;
	margin: 0px;
	text-align: center;
	font-family: 'Microsoft YaHei', serif;
}
div {
	margin-right: auto;
	margin-left: auto;
	text-align: left;
}

a {
	color: white;
	text-decoration: none;
}

#nav {
	margin: 0px;
	padding-top: 20px;
	list-style: none;
	white-space: nowrap;
}
#nav li {
	float: left;
	margin: 1px;
	width: 90px;
	background-color: #CCC;
	line-height: 30px;
	text-align: center;
}

#app-bg {
	width: 760px;
	height: 500px;
	background-color: #4777BE;
	color: #FFF;
}
.clear {
	clear: both;
}
